Al-Jazeera, one of the largest news organisations in the world, said that it "deplores" calls for it to be taken off air.

"We in the network believe that any call for closing down Al-Jazeera is nothing but an attempt to silence the freedom of expression in the region and to suppress people's right to information," the broadcaster said in a statement.

As well as cutting diplomatic ties, Qatar's neighbours closed their air space to Qatari carriers and blocked the emirate's only land border, vital for its food imports.

The list of 13 demands circulating on social media also says Qatar must cut ties to groups including the Muslim Brotherhood, the Islamic State organisation, Al-Qaeda and Lebanon's Iran-backed Hezbollah movement.

Qatar is also required to hand over opposition figures wanted by its three neighbours and Egypt.

In addition to Al-Jazeera, it must shut online information sites that it supports, according to the reported demands.

"The brother (Qatar) must realise that the solution for its crisis lies not in Tehran or Beirut or Ankara or Western capitals or in media outlets, but in regaining the trust of its neighbours," Gargash said.

"It is not possible to accept that the brother continues as the Trojan horse" in the Gulf or as a funder and "platform for an extremist agenda", he added.

Earlier this week, a foreign diplomat told AFP the crisis had reached a "stalemate" and "won't end soon".

Tillerson said on Wednesday that Washington had been pushing for a clear list of grievances that are "reasonable and actionable".

"Our role has been to encourage the parties to get their issues on the table, clearly articulated, so that those issues can be addressed and some resolution process can get underway to bring this to a conclusion," he said.

His spokeswoman Heather Nauert said Tuesday the United States was "mystified" that Saudi Arabia and its Gulf allies had failed to present details justifying their embargo on Qatar.